Application Resource Monitor (ARM) is an application that provides a service that will monitor third party applications to watch for background system resource abuse (which causes accelerated battery depletion) and will automatically close these applications.

-ARM monitors applications that are not in the user's focus:
-When an application is in the background
-All applications when the display backlight is turned off
-Users are notified of applications via the notification banner
-Users are able to disable automatic closing of applications
-Users can tell ARM to not monitor the application via the notification
-Available for BlackBerry 7.1 only

I overslept one morning because it terminated the alarm on my 3rd party alarm app. I was thinking about deleting it. If you are navigating using GPS and and BlackBerry Traffic or other navigation app, and it terminates the nav app, that could be problematic.